/*****************************************************************************/
/*                                                                           */
/*                                   cpu.c                                   */
/*                                                                           */
/*                            CPU specifications                             */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2003-2011, Ullrich von Bassewitz                                      */
/*                Roemerstrasse 52                                           */
/*                D-70794 Filderstadt                                        */
/* EMail:         uz@cc65.org                                                */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/

/* common */
#include "addrsize.h"
#include "check.h"
#include "cpu.h"
#include "strutil.h"

/*****************************************************************************/
/*                                   Data                                    */
/*****************************************************************************/

/* CPU used */
cpu_t CPU = CPU_UNKNOWN;

/* Table with target names */
const char *CPUNames[CPU_COUNT] = {
    "none", "6502", "6502X", "65SC02", "65C02", "65816", "sweet16", "huc6280", "m740", "4510",
};

/* Tables with CPU instruction sets */
const unsigned CPUIsets[CPU_COUNT] = {
    CPU_ISET_NONE,
    CPU_ISET_6502,
    CPU_ISET_6502 | CPU_ISET_6502X,
    CPU_ISET_6502 | CPU_ISET_65SC02,
    CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02,
    CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_65816,
    CPU_ISET_SWEET16,
    CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_HUC6280,
    CPU_ISET_6502 | CPU_ISET_M740,
    CPU_ISET_6502 | CPU_ISET_65SC02 | CPU_ISET_65C02 | CPU_ISET_4510,
};

/*****************************************************************************/
/*                                   Code                                    */
/*****************************************************************************/

int ValidAddrSizeForCPU(unsigned char AddrSize)
/* Check if the given address size is valid for the current CPU */
{
  switch (AddrSize) {
  case ADDR_SIZE_DEFAULT:
    /* Always supported */
    return 1;

  case ADDR_SIZE_ZP:
    /* Not supported by None and Sweet16 */
    return (CPU != CPU_NONE && CPU != CPU_SWEET16);

  case ADDR_SIZE_ABS:
    /* Not supported by None */
    return (CPU != CPU_NONE);

  case ADDR_SIZE_FAR:
    /* Only supported by 65816 */
    return (CPU == CPU_65816);

  case ADDR_SIZE_LONG:
    /* Not supported by any CPU */
    return 0;

  default:
    FAIL("Invalid address size");
    /* NOTREACHED */
    return 0;
  }
}

cpu_t FindCPU(const char *Name)
/* Find a CPU by name and return the target id. CPU_UNKNOWN is returned if
** the given name is no valid target.
*/
{
  unsigned I;

  /* Check all CPU names */
  for (I = 0; I < CPU_COUNT; ++I) {
    if (StrCaseCmp(CPUNames[I], Name) == 0) {
      return (cpu_t)I;
    }
  }

  /* Not found */
  return CPU_UNKNOWN;
}
